CVE-2024-57223
📋 TL;DR
This CVE describes a command injection vulnerability in Linksys E7350 routers that allows attackers to execute arbitrary commands on the device. The vulnerability exists in the apcli_wps_gen_pincode function via the ifname parameter. All users of affected Linksys E7350 routers are at risk.
💻 Affected Systems
- Linksys E7350
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router leading to full network access, credential theft, malware deployment, and persistent backdoor installation.
Likely Case
Router takeover allowing network traffic interception, DNS hijacking, and lateral movement to connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access and strong network segmentation.
🎯 Exploit Status
Public GitHub repository contains proof-of-concept. Command injection vulnerabilities are typically easy to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Linksys support site for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable WPS functionality
allDisable Wi-Fi Protected Setup feature which may reduce attack surface
Restrict admin interface access
allLimit access to router admin interface to trusted IP addresses only
🧯 If You Can't Patch
- Replace vulnerable router with updated model
- Isolate router in separate VLAN with strict firewall rules
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin interface under Administration > Firmware UpdateCheck Version:
Login to router admin interface and check firmware versionVerify Fix Applied:
Verify firmware version is newer than 1.1.00.032📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed authentication attempts to admin interface
- Suspicious ifname parameter values in web logs
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains
- Unexpected port scans originating from router
SIEM Query:
source="router_logs" AND ("apcli_wps_gen_pincode" OR "ifname=" AND ("|" OR ";" OR "$" OR "`"))